Thousands of Occupy Wall Street protesters swarmed the Brooklyn Bridge Saturday, shutting down car lanes and setting up yet another showdown with the NYPD. Dozens of people were arrested after standing in the roadway, blocking the Brooklyn-bound lanes. Traffic in the opposite direction was slowed -- but still running after the 4 p.m. standoff.

Police called in city buses to haul away some of the handcuffed demonstrators.

"People were trying to climb off [the roadway to the pedestrian] walkway, but they were freaking out," Mariana Flor, 23, said of the police.

Flor said cops warned protesters that if they didn't move, they'd be arrested.

Some of the demonstrators estimated more than 100 people were arrested.